Twyeh



REUBEN A. GOODRICH, OF MILFORD, NEW YORK.

TWYER.

Specification of Letters Patent No. 2,975', dated February 24, 1843.

To all whom t may concern:

Be it known that I, REUBEN A. GOOD- Rrcrr, of the town of Milford, in the county of Otsego and State of New York, have invented a new and useful Improvement Yin instruments used by Blacksmiths, called Tue-Irons, orV 'Iwyers, to be called Goodrichs Improved Patent Counten Blast; which is described as follows, reference being had to the annexed drawings o f the same, makinOPV part of this specification.

Figure l is a horizontal section. Fig 2 is a vertical section. Fig. 3 is an end view of one of the outlets.

Similar letters refer to corresponding parts.

This instrumentconsists of two curved Vtubes A, B, made the segments of a circle,

of about ten inches diameter united at two of their extremities by a lap joint C and separated at their opposite extremities in which the outlets D for the blast are made, by a space E of about six inches, in the middle of which and perpendicularly above the horizontal plane thereof the blast previously divided into two currents, are made to meet in the manner hereafter described. Near the middle of one of the sect-ions of the aforesaid curved tube and in the convex side thereof is inserted a straight tube F of about iive inches long and two inches diameter with a bore of one inch, and into which the nozzle of the bellows is inserted for introducing theblast to the curved tube which is divided into two currents by a triangular projection or bridge Gr placed in t-he aforesaid curved tube opposite the center of the straight tube with the apex pointing tio-ward the center off the said straight tube- The extremities of the curved tubes are gradually reduced in diameter from the points J J to the outlets. The ends of the sections of the tubes where they unite by the lap joint are made straight or nearly straight a distance of about -linches. The diameter outside is about two inches.V The bore of the tube from the points J to J (which are about two inches from the ex tremities) are made circular and of the same diameter of one inch throughout. From these points to the outlets the bore is changed in its form and direction being gradually altered from a circular to a rectangular form, which form it assumes at the outlets being parallelograrns of about one inch by of an inch above the horizontal line of 'triangular projection and from thence discharged into the curved tubes in an unbrokenl stream in each direction right and left until the branches of the stream arrive at the points J J where its direction is 'changed upward and is discharged at the rect-angular orifices near the to-ps of the contracted portions ofthe tubes and meets at a point r43 o-r t inches above and perpendicular to the point N.

The instrument should be placed and bedded into the forge horizontally about 3 inches below the surface, in a situation to receive the nozzle of the bellows into the straight tube which should be covered with a tire stone. The extremities of the curved tube should be protected from the effect of' the extreme heat by the proper formation Of a place lin the hearth to receive it. A suit-able place should be prepared for the tire at the junction Of the currents of air 'above the outlets or extremities of the The currents of air in the curved tubes. aforesaid counter blast are thus made to come in contact with the fire above the extremities of the tubes for the purpose of preventing the destruction of the tubes by the intenseness of the heat.

The instrument maybe made of cast iron or any suitable material and of any size or proportion required variable at pleasure to suit circumstances. Y

Ido not claim to b e the inventor of a counter blast for blacksmiths forges, but

Vhat I do claim as my invention and which I desire to secure by Letters Patent The combination of the inclined apertures D with the circularly formed twyers A B,

constructed as described and also in combination therewith the bridge G Vfor di-v viding the blast in the manner and for the purpose set forth.

Y wWitnesses: Y Y Y YVV-rLLIAM KIRBY,

GEORGE KIRBY.

REUBEN A, GOODRroH.Y

ran lerares PATENT carica. 

